Li Na beats Angelique Kerber at WTA Championships in Istanbul

Istanbul: Li Na defeated Angelique Kerber of Germany 6-4, 6-3 on Thursday to retain a slim chance of advancing at the WTA Championships. Li's first win in two round-robin matches means she can still reach the semifinals, depending on other results in her Red Group.

The fifth-ranked Kerber, making her first appearance in the season finale, bowed out after losing all three of her matches. She played more than three hours on Wednesday night in a three-set loss to No. 1 Victoria Azarenka.